Mysteries of ozone depletion continue 25 years after the discovery of the Antarctic ozone hole

Even after many decades of studying ozone and its loss from our atmosphere, plenty of mysteries and surprises remain, including an unexpected loss of ozone over the Arctic this past winter, an authority on the topic has said. She also discussed chemistry and climate change, including some proposed ideas to "geoengineer" the Earth's climate to slow down or reverse global warming at a recent meeting.

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